Air-bag valve



1929- c. IVAN REniNEs AIRBAG VALVE Filed Dec. 10, 1927 gmntoz Coz'neZ/s Van P0222228.

l atente'd Nov. 12, 19 29 GORNELIS VAN RENNES, or AKRON, OHIO, Assn-Non TorH-E (GOODYEAR TIRE & RUBBER COMPANY, or AKRON, oHIo, A conronnrron OF OHIO AIR-BAG VALVE r.

Application filed. DecemberlOi 1927. "serial no. 239,128. T

This invention relates to airbags of the type utilized as cores for pneumatic tire casings during the vulcanizing operation and it has particular relation to valves for inflating and deflating such bags.

WVhen the use of rubber airbags as cores for pneumatic tires was first proposed and p'ractised, the heat of the vulcanizing operation overcured the material of the bags and caused cracking and breaking thereof after use in only one or two tires. This difliculty has now been overcome by the utilization of a liquid,

such as glycerine, within the bag, which serves to maintain the interior surface of the bag 151 coated and therefore prevents overcuring and oxiclization of the inner portion of the bag material. 7

A single airbag may now be used to cure about fifty tires before the exterior surface '20: of the bag becomes checked. The exterior of the bag is then ground OE and a new cover is applied, after which the bag may be again utilized. The use of glycerine or a similar liquid in the cores is essential as it permits I 2510f the use of a single core for the curing of from one hundred to two hundred tires,-

whe-reas'it was formerly possible to cure a comparatively few tires with a s ngle bag.

Considerable difliculty has been experienced'by reason of discharge of the glycerine from the valve of the core during manipulation thereof. Although only a small amount of the liquid, for example one-half pint to two quarts, is utilized in each core, a portion of the liquid often collects within the hollow Theessential object of this invention is to provide a valve for an airbag designed-to prevent flow of the glycerine into the valve so that it cannot be subsequently blo'wnout upon the unvulcanized tire. Q

For a better understanding of theiinvntion, reference may now be had to the acc0m panyi-ng drawings forminigapart of thedisclosure, in which;

Fig. 1 is a cross'sectionalvi ewof an airbag having a valve embodying the features of this. invention 'operatively associated therewith;

Fig. 2 is a side-elevational view, partially in section,' of 'a'valve showing a'modifi' ed embodiment of-the invention;

Fig. 3 is a top plan view on alarger scale of the form of valve illustrated in Fig. 1; 1 f Fig. 4 is a similar'view of a valve having an additional feature that may be realizedlin the invention; and W 7 Fig.5 is a fragmentary sectional'view of a portion'of the valve'shown'in Fig." i, the section being taken substantially along line- V-VofFig/ i.

In the particular embodiment ofthe inven tion illustrated in Figure 1 of the accompanying drawings, a tube 11 traverses thew all 12 of an airbag 13 and is formed adjacent its inner end with an. elongate fiangel i that" is embedded'in' the wall 12 of the bag. A

hemispherical projection 15, apertured, as

indicated at 16,'in alignment with thepassage, of the tube 11, extends from the flange-14 into the interior of. the bag. A nut '17, threaded on the tube 11, engages a washer 18 which c'oacts with the flange 14 tomain tain the tube in operative position with respect to the bag 13 Extensions 19 may be attached to. the tube 11 to adapt it for use.

with different types of hose fittings. V

The embodiment of the invention illustrated in. Fig. 2 differs from that ju'stdescribed in that' a projection 21 is'utilized which is semi-ellipsoidal in form and conse-' quently does not extend as far into the bag as does the projection 15.

7 A groove 22 may be provided in the projectionQl, in concentric relation to the aperture 16 therein, to aid in preventing flow'of the glycerine into the tube 11. It is to be understood that such groove may be employed in conjunction with the type of valve illustrated in Fig. 1, as well as with that illustrated in the other figure. In practice, however,'the groove; is not required. when a hemisphericalprojection isutilized, unless an unusually large amount of liquid is to be contained within the bag.

'Froin the foregoing description it will be apparent that l the above mentioned difliculties have been overcome by the provision. of

an airbag having a valve formedyvith 'a curved projection extending intointerior of the bag. 7

elt ue ly ere llus r ted: only one fo whieh invention may-assume and have described only asingle application thereof,

it will beapparent totho se skilled in the art that it is not so limited, but that various minor modifications maybe made therein without departing from: the spirit of the invention or,

he p Qfihe ppended: e a me.

What I claim is: e

1 airbag. comprising a ,hollow body 4 j and. a tube extending through the wall; of the d? t rm ati g nah m ph r e l. sl

7 the and. d sp se thin h ody- 2.- An airbag-comprising ayhollow annular body, a tube extending, through the wall of thebody, a flange, on thetube, and a curved p je t on xt-ending; from, the flange 'into theIinter-iorottlm body and formed with a q eentriegr ovee 3. An airbagcomprising a; ho1low annular, body, a tube extending. through the of the. body, a flangeon. the tube, and, a hemis her ical. projection extending from the;

ange' into the interior of the body and qrmed: with. a cqnc ntric; groove.

interior of the body, and formed with a groove disposed about the opening in the tube.

8. An airbag comprising a hollow annular v Signed at Akron, in thecounty of Summit,

and7State of Ohio, this 8th day of'December, 192

CORNELIS VAN RENNES.

. An; rbag alv ompri ing a e, a;

flangev on the tube, anda curved projection extendjngifrom; flange and formed with;

1 ement- 1 am. a

5. An a rbag comprlslng a hollow annular body, ai tube extending through. the wall (of the. body, a projectionfextending from the.

inneriend' ofthe tube into the interior ofthe,

body. and formed with a groove disposed about the opening in the tube.

6} An. airbag comprising a hollow annular posed aboutithe' opening in the tube.

. 1-7:? An airbagcomprising a'hollow annular body, a: tube extending through the wall of bodg, a tube extending throughthe wall of- "Ody, acurved projection extending from 1 the inner endof'the tube into the interior of theflbodyl and formed-with a groove dis-' 

